Type-writer carriage-feed.



J. ALEXANDER.

TYPE WRITER CARRIAGE FEED.

APPLICATION FILED MAR. 30, 1912.

1,041,557 Patented 0@1;.15,1912.

2 SHEETSSHEET 1.

Fig. l-

WITNESSES coLumnlA PLANOGRAPH cu, WASHINGTON. u. c

J. ALEXANDER.

TYPE WRITER CARRIAGE FEED.

APPLICATION FILED MAR. 30, 1912.

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' WITNESSES coLuMmA PLANOGRAPH CO.,WASHINGTDN. D cv .1... pares fa nt JESSE ALEXANDER, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO STEPHEN G. HALSTEAD, OFBROOKLYN, NEW] YORK.

TYPE-WRITER CARRIAGE-FEED.

Specification of Letters latent.

Patented Got. 15, 1912.

Application filed March 30,. 1912. Serial No. 687,353.

To all whom it may concern:

Be it known that I, JESSE ALEXANDER, a citizen of the United States, and resident of New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in Type- VVriter Carriage-Feed, of which the following is a specification.

This invention relates particularly to visible writing machines but it will be obvious that certain of the principles involved may be applied to any type of writing machine.

The following description and claims should therefore be interpreted accordingly.

The main object is to provide a strong, durable and reliable mechanism which can be operated readily. The improvements reside in what is commonly termed the'escapement for controlling step by step movements of the carriage from right to left during the normal operation of the machine. A bar carried by the carriage has oppositely faced teeth on its front and rear edges. The lever oscillated by the universal bar has teeth or dogs adapted to engage this toothed 7 bar. One of the oscillating dogs is pivoted and spring pressed so as to move laterally in the machine when it is oscillated to the rear and thus on the next oscillation to be interposed in the path of the next tooth of the carriage rack. This movable dog is also adapted to be retracted by a finger lever for releasing the carriage so that it can be moved freely from side to side.

The principles and preferred form of the invention are illustrated in the accompanying two sheets of drawings.

Figure 1, is a longitudinal vertical sectional view of a machine showing my invention, the parts being in their normal position of rest. Fig. 2, is a fragmentary view showing the manual release of the carriage so as to permit the carriage to be moved freely from side to side. Fig. 3, is a plan view of parts of the machine, part of the carriage being omitted. Fig. 4, is a fragmentary plan view showing the escapement mechanism in the position which it occupies when a type bar is at the printing position and the carriage is about to be released for feeding. V The key lever 1 is pivoted at 2 and its rear end is pressed downward by the spring 3 and an adjusting screw 4. The type bar 5 is'pivoted at 6 in the type bar plate 7.

end connected by a spring 11 to the key lever. The type bar has a shoulder 12 adapted to be engaged by the upper end 13 of the intermediate lever at the starting of the printing stroke. In this way the type bar is brought yieldingly into action by the depression of the key lever. The platen 20 is carried by the carriage side plate 21 in rear of the type bar plate 7. The front carriage wheel 22 travels on the track 23 and the rear sleeve of the carriage 24 travels on a rod 25. The rocker 30 pivoted at 31 is under tension of a spring 32 which may be adjusted by the thumb nut 33. The carriage rack 34 has teeth on its front and rear edges and the rocker 30 has pawls or dogs adapted to co-act therewith. The front dog 35 is fixed to the upper front portion of the rocker 30 and the dog 36 is spring pressed and'pivotally mounted on a pin 37 so that its front end may be moved transversely relative to the rocker 30 in the step by step feeding action. The carriage is normally under tension from a drum 38 in a suitable manner. The universal bar 39 is guided at 40 at its front end and connected at 41 at its rear end to the rocker 30. It will thus be seen that as the type bar action operates, the universal bar and rocker are moved rearwardly so that the dog 36 engages the rack 34 and the dog 35 is disengaged. When the type bar is released the spring 32 throws the rocker back to its original position and the dog 36 is interposed in front of the tooth succeeding the tooth which it previously engaged so that the carriage is fed one tooth toward the left.

The dog 36 is pivoted on the pin 37 in the carrier 43 and the latter is hinged at 44 to the rocker. The spring 45 holds the carrier in the position shown in Fig. 1 yieldingly. The rod 46 is carried by two levers 47, 47 on opposite sides of the machine. These levers are pivoted as at 48 to the carriage and provided with finger pieces such as 49 so that the levers may be pressed to the rear by pressure of the finger or thumb so as to depress the rear of the dog carrier 43. This will disengage the dog 36 from the rack 34 as shown in Fig. 2.

' The ribbon 50 is carried by two spools 51, and 52 and guided by a guide 53 in rear of the type bar plate. This guide 53 is connected at its lower end to the lever 54L pivoted at 55. The pivot 55 is supported by an arm 56 which projects downward and rearward from the rod 23. a The upper end of the lever 54 is connected at 57 to the rocker by a pin and slot connection so that asthe rocker 30 is oscillated the lever 54: is oscillated and the guide 53 is lifted up and down so as to interpose the ribbon in front of the printing point in the path of the type. The paper may be guided back of the platen by the introductory guide 60 and in front of the platen by fingers such as 61.

The type bar action as herein shown is more fully described and claimed in an accompanying application filed March 30th, 1912, Serial No. 687,354.

What I claim is 1. In a typewriting machine, a carriage rack having teeth on its front and rear edges, a rocker having two dogs for coacting with said teeth, a key operated means for oscillating said rocker in one direction, a spring for oscillating said rocker in the other direction, one of said dogs being stationary relative to said rocker, a support for the other dog carried by said rocker on a pivot parallel with said rack, a spring engaging said support, a vertical pivot carried by said support for its dog and a spring interposed between said dog and said support and means for tilting said support on its pivot to'retract its dog without moving the rocker.

2. In a t-ypewriting machine, a carriage rack having teeth on its front and rear edges, a rocker having dogs for coacting with said teeth, means for oscillating. said rocker backward and forward, one of said dogs being fixed relative to said rocker, a support for the other dog pivotally carried by said rocker on a pivot parallel with said rack, a vertical pivot carried by said support for its dog, a spring interposed between said latter dog and said support, a rod pivotally carried by the carnage and extending across the machine and engaging said support and a finger-piece connected with said rod for tilting said rod and tilting said support to retract the dog carried. thereby. V r V JESSE ALEXANDER.

Witnesses:

' Gno. W. PnARsAL STEPHEN C. HALSTEAD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). C. i 

